802.11ax Explained

The new WiFi6 supports 802.11ax mode, so what is the difference between 802.11ax and 802.11ac mode?

Compared with 802.11ac, 802.11ax proposes a new spatial multiplexing technology, which can quickly identify and retreat air interface conflicts. Meanwhile, it can identify interference signals more effectively and reduce mutual noise interference by means of dynamic idle channel evaluation and dynamic power control. Thus, the wireless experience in stations, airports, parks, stadiums and other high-density scenes is greatly improved, and the average throughput is said to reach 4 times that of the 802.11ac standard. It introduces a higher order modulation coding scheme 1024QAM. Compared with the highest 256QAM in 802.11ac, the encoding modulation efficiency is higher. The correlation rate of each 80M bandwidth space stream increases from 433Mbps to 600.4Mbps. 8 spatial streams) increased from 6.9Gbps to 9.6Gbps, and the highest correlation rate increased by nearly 40%. 802.11ax uses upstream and downstream MU-MIMO and upstream and downstream OFDMA technologies respectively to carry the concurrent transmission of multiple users with multi-space streams and multi-subcarriers, which increases the efficiency of the air interface, reduces the application delay, and also reduces the conflict avoidance of users, providing better transmission guarantee in multi-user scenarios.